Exhibit 5.1

	1271 Avenue of the Americas
	New York, New York 10020-1401
	Tel: +1.212.906.1200 Fax: +1.212.751.4864
	www.lw.com
	FIRM / AFFILIATE OFFICES
	Austin	Milan
	Beijing	Munich
	Boston	New York
	Brussels	Orange County
	Century City	Paris
	Chicago	Riyadh
	Dubai	San Diego
May 15, 2024	Düsseldorf	San Francisco
	Frankfurt	Seoul
	Hamburg	Silicon Valley
Atlassian Corporation	Hong Kong	Singapore
350 Bush Street, Floor 13	Houston	Tel Aviv
San Francisco, California 94104	London	Tokyo
	Los Angeles	Washington, D.C.
	Madrid

Re:          Atlassian Corporation - Registration Statement on Form S-3 (Registration No. 333-279132)

To the addressee set forth above:

We have acted as special counsel to Atlassian Corporation, a Delaware corporation (the “Company”), in connection with the issuance of $500.0 million aggregate principal amount of its 5.250% Senior Notes due 2029 (the “2029 Notes”) and $500.0 million aggregate principal amount of its 5.500% Senior Notes due 2034 (the “2034 Notes” and, together with the 2029 Notes, the “Notes”), pursuant to a registration statement on Form S-3 under the Securities Act of 1933, as amended (the “Act”), filed with the Securities and Exchange Commission (the “Commission”) on May 6, 2024 (Registration No. 333-279132) (as so filed and as amended, the “Registration Statement”), a base prospectus, dated May 6, 2024, included in the Registration Statement at the time it originally became effective (the “Base Prospectus”), a preliminary prospectus supplement, dated May 8, 2024, filed with the Commission pursuant to Rule 424(b) under the Act, the document that the Company has identified as an “issuer free writing prospectus” (as defined in Rule 433 and Rule 405 under the Act), a final prospectus supplement, dated May 8, 2024 filed with the Commission pursuant to Rule 424(b) under the Act on May 10, 2024 (such final prospectus supplement, together with the Base Prospectus, the “Prospectus”), and an underwriting agreement, dated May 8, 2024, among representatives of the several Underwriters named in the underwriting agreement and the Company (the “Underwriting Agreement”). The Notes are being issued pursuant to an indenture, dated as of the date hereof (the “Base Indenture”), between the Company and U.S. Bank Trust Company, National Association, as trustee (the “Trustee”), as supplemented by that certain First Supplemental Indenture, dated as of the date hereof, between the Company and the Trustee, setting forth the terms of the Notes (together with the Base Indenture, the “Indenture”). This opinion is being furnished in connection with the requirements of Item 601(b)(5) of Regulation S-K under the Act, and no opinion is expressed herein as to any matter pertaining to the contents of the Registration Statement or related prospectus, other than as expressly stated herein with respect to the issue of the Notes.

May 15, 2024

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As such counsel, we have examined such matters of fact and questions of law as we have considered appropriate for purposes of this letter. With your consent, we have relied upon certificates and other assurances of officers of the Company and others as to factual matters without having independently verified such factual matters. We are opining herein as to the internal laws of the State of New York, and we express no opinion with respect to the applicability thereto, or the effect thereon, of the laws of any other jurisdiction or as to any matters of municipal law or the laws of any local agencies within any state.

Subject to the foregoing and the other matters set forth herein, it is our opinion that, as of the date hereof, when the Notes have been duly executed, issued and authenticated in accordance with the terms of the Indenture and delivered against payment therefor in the circumstances contemplated by the Underwriting Agreement, the Notes will be legally valid and binding obligations of the Company enforceable against the Company in accordance with their respective terms.

Our opinions are subject to: (i) the effect of bankruptcy, insolvency, reorganization, preference, fraudulent transfer, moratorium or other similar laws relating to or affecting the rights and remedies of creditors; (ii) (a) the effect of general principles of equity, whether considered in a proceeding in equity or at law (including the possible unavailability of specific performance or injunctive relief), (b) concepts of materiality, reasonableness, good faith and fair dealing and (c) the discretion of the court before which a proceeding is brought; and (iii) the invalidity under certain circumstances under law or court decisions of provisions providing for the indemnification of or contribution to a party with respect to a liability where such indemnification or contribution is contrary to public policy. We express no opinion as to: (a) any provision for liquidated damages, default interest, late charges, monetary penalties, make-whole premiums or other economic remedies to the extent such provisions are deemed to constitute a penalty; (b) consents to, or restrictions upon, governing law, jurisdiction, venue, arbitration, remedies, or judicial relief; (c) waivers of rights or defenses relating to stay, extension and usury laws; and waivers of broadly or vaguely stated rights; (d) any provision requiring the payment of attorneys’ fees, where such payment is contrary to law or public policy; (e) any provision permitting, upon acceleration of the Notes, collection of that portion of the stated principal amount thereof that might be determined to constitute unearned interest thereon; and (f) the severability, if invalid, of provisions to the foregoing effect.

With your consent, except to the extent we have expressly opined as to such matters with respect to the Company herein, we have assumed (a) that the Indenture and the Notes (collectively, the “Documents”) have been duly authorized, executed and delivered by the parties thereto, (b) that the Documents constitute legally valid and binding obligations of the parties thereto, enforceable against each of them in accordance with their respective terms, and (c) that the status of the Documents as legally valid and binding obligations of the parties is not affected by any (i) breaches of, or defaults under, agreements or instruments, (ii) violations of statutes, rules, regulations or court or governmental orders or (iii) failures to obtain required consents, approvals or authorizations from, or make required registrations, declarations or filings with, governmental authorities.

May 15, 2024

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We express no opinion with respect to (i) advance waivers of claims, defenses, rights granted by law or notice, opportunity for hearing, evidentiary requirements, statutes of limitation, trial by jury or at law or other procedural rights; (ii) waivers of broadly or vaguely stated rights; (iii) covenants not to compete; (iv) provisions for exclusivity, election or cumulation of rights or remedies; (v) provisions authorizing or validating conclusive or discretionary determinations; (vi) grants of setoff rights; (vii) proxies, powers and trusts; and (viii) provisions prohibiting, restricting or requiring consent to assignment or transfer of any right or property.

This opinion is for your benefit in connection with the Registration Statement and may be relied upon by you and by persons entitled to rely upon it pursuant to the applicable provisions of the Act. We consent to your filing this opinion as an exhibit to the Company’s Form 8-K dated May 15, 2024 and to the reference to our firm contained in the Prospectus under the heading “Legal Matters.” In giving such consent, we do not thereby admit that we are in the category of persons whose consent is required under Section 7 of the Act or the rules and regulations of the Commission thereunder.

Sincerely,

/s/ Latham & Watkins LLP